Three dimensional chessboard



FIG. 1 is a first perspective view of a three dimensional chessboard according to our new design, in which the left and right side sequentially step downward six steps from the two center squares on one side to the two side middle squares and back upward six steps to the two center squares on the opposite side, and the center four squares of the board are in a middle level position that is three steps downward and back upward going from the one side and then the opposite side;

FIG. 2 is a second perspective view of an opposite side of FIG. 1 of the three dimensional chessboard, illustrating the mirror design of the right and left sides;

FIG. 3 is a top view thereof;

FIG. 4 is a left side plan view thereof;

FIG. 5 is a right side plan view thereof; and,

FIG. 6 is a bottom view thereof. 

CLAIM We claim the ornamental design for a three dimensional chessboard, as shown and described. 